VoIP, otherwise known as Voice over Internet Protocol, is a digital solution for telecommunication that utilizes the transmission of voice through the use of data over the internet. This technology is typically adopted for both commercial and privately used applications. VoIP developers specialize in programming telecommunication systems using data transmission to provide efficient services for audio and video functions.

VoIP developers are highly sought after professionals as they can create a versatile and advanced system for both desktop and mobile devices. This can include creating a more interactive experience for customers with multi-way calls, conference calls, video conferencing and voicemail systems. VoIP developers can set up your business’s phone system such as forwarding calls remotely to other devices with extensions or even communicating with customers utilizing software like Callcentric, Flowroute or Voxbone.

Here's some projects that our expert VoIP Developer made real:

  • Secured and configured private networks by implementing security measures like IP SLA, NAT and ACLs
  • Integrating SIP trunks between billing platforms, PBXs and VoIP applications
  • Setting up Postfix mail server on Linux systems with TLS authentication and encryption
  • Installing and configuring sip telephony software like ASTPP into businesses
  • Developing web applications that can send and receive SMS messages utilizing VoIP APIs

Our expert VoIP Developer have created numerous projects to help business owners manage their telecommunications in a professional bet. Our developer have an array of experience in creating a secure and reliable system customized to each client demands. If you're looking to improve or create your business’ communication system, then post your project today on Freelancer.com to hire one of our skilled professional VoIP Developers today!

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    28 pekerjaan ditemukan, seharga USD

    I'm currently using a manual dialing system and looking to transition to ViciDial to handle my call volume of 50-500 calls per day. I'm specifically interested in the predictive dialing feature. Ideal skills and experience for this job would include: - Expertise in ViciDial setup and configuration - Solid understanding of call center operations - Experience in optimizing dialing systems for medium call volumes - Mastery in setting up predictive dialing systems Success on this project would mean a smooth transition from my current manual dialing system to an optimized ViciDial system that can effectively manage my daily call volumes, incorporating predictive dialing capabilities for efficiency.

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    I'm in search of an experienced Radius Server Developer who can take on a comprehensive project. create a radius server that can communicate with OLT, ROUTERS AND VM on HUAWEI, CISCO, FIBERHOME, VSOLUTION, MIKROTIK, UBIQUIT and others through PPPOE, VLAN, IPOE, HOTSPOT ETC

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    I'm looking for an experienced computer administrator to help me set up a call center system using Vicidial. Additionally, I require network maintenance services and an OpenVPN setup for 11-50 users. Key Tasks: - Setting up a Vicidial call center system - Providing ongoing network maintenance and computer maintenance - Configuring OpenVPN for 11-50 users business hours 7am-6pm pst los angles time send me resume and sample of your work full or part time job available Ideal Skills and Experience: - Proven experience in setting up Vicidial call center systems - Strong background in network maintenance - Proficient in OpenVPN configuration - Familiarity with supporting 11-50 users - Excellent problem-solving skills and attention to detail Please bid if you have the right skills and ...

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    I need a skilled Kamailio specialist to set up a proxy server that's capable of sending push notifications to Android and iOS softphone apps. Key Requirements: - Cross-Platform Compatibility: The server needs to support both Android and iOS. - High Volume: The proxy will need to handle a substantial amount of push notifications, so performance and reliability are paramount. Ideal Skills & Experience: - Expertise in Kamailio: Experience working with Kamailio in a similar capacity is essential. - Push Notification Implementation: A strong understanding of push notifications and how to implement them across different platforms. - Mobile App Development: Knowledge of mobile app development, particularly on Android and iOS, is a plus. Please provide details of your experience with ...

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    Apollo.io Setup for Recruitment Sales 4 Hari left
    TERVERIFIKASI

    I'm looking for an experienced professional who can help me with setting up and utilizing to enhance my recruitment business. Key Responsibilities: - Set up : I need assistance in creating an effective setup of from scratch. This includes but is not limited to integrating with our existing systems and ensuring all necessary tracking and analytics are implemented. - Lead Generation: Utilize to identify and engage with potential leads in the recruitment sector. Key Objectives: - Increasing Sales Conversions: The primary goal of using is to improve our sales conversion rates. The ideal candidate should be able to strategize and implement initiatives that will lead to increased sales and revenue. Ideal Candidate: - Proven Track Record: I'm looking for someone who has a succ...

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    PBX / VOIP / SBC engineer 4 Hari left
    TERVERIFIKASI

    I'm in need of an experienced PBX / VOIP / SBC engineer who can address several issues with our customers phone systems system. The primary goal of this project is to troubleshoot and maintain current systems. Key Responsibilities: - Troubleshoot ongoing call quality issues - Investigate and resolve call drops - Address any connectivity problems Skills Required: - Extensive experience with Asterisk and other PBX systems - In-depth knowledge of VOIP network architecture - Proven track record in troubleshooting and maintenance Please only apply if you have a strong background in VOIP technologies and are confident in your ability to resolve issues.

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    I'm in need of an experienced Genesys engineer who specializes in configuration, reporting, and integration. You will be responsible for: - - Required reporting includes real-time reporting, historical reporting, and the creation of custom reports. Reports and dashboards need to be setup Expertise in Genesys configuration is a must, coupled with strong troubleshooting skills. A thorough understanding of IVR setup and skill-based routing configuration is also necessary. Knowledge of differing reporting techniques would be a plus. In addition you will be expected to show your expertise on the Genesys platform.

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    FlyNumber PBX System Integration 3 Hari left
    TERVERIFIKASI

    I am currently using FlyNumber PBX system with Acrobits phone app and it requires further integration. FlyNumber has an integrated PBX dashboard but needs to be reconfigured. The following features should be implemented: - Call Forwarding: This is necessary for smooth operation. - Voicemail Management: Must handle voicemail effectively. - Call Routing: Ensures calls are directed appropriately. - Call Recording: Important for quality assurance. - Custom Greetings and Transfer Music: Two phone numbers specifically need custom greetings, and I want my calls to have transfer music playing. The ideal candidate will have experience in PBX systems specifically FlyNumber. Advanced knowledge of call features as mentioned and previous work on voicemail handling, call routing and call recording is...

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    FusionPBX Dial Plan Development 3 Hari left
    TERVERIFIKASI

    I am seeking a highly skilled freelancer with intensive experience in FusionPBX and Freeswitch. The main objective of this project is the creation of a precise dial plan for FusionPBX. The developed dial plan should effectively handle active calls - holding them temporarily during paging calls. Key tasks include: * Dial plan must allow higher priority calls to override held calls * Acceptance of priority levels for different callers as input parameters The ideal candidate should possess these skills and experience: * Proven experience in FusionPBX and Freeswitch * Knowledge of implementing dial plans * Understanding of call flows and priority handling. Your task will revolve around ensuring a smooth call flow process during the paging, which detailed understanding of PBX systems an...

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    We will give you: 1. Virtual Numbers 2. SIP Trunk server I am in need of an expert who can develop a SIP Trunk server with the capability of enabling live voice stream access. Key Requirements: - SIP Trunk Server: The primary purpose of this project is the development of a SIP Trunk server. It is essential that the chosen freelancer has experience in developing such systems. - Live Voice Stream Access: The server must offer functionality to enable live voice stream access. This feature must be robust, reliable, and seamlessly integrated into the server. - Access Control: I need the live voice streams to be secured with user-based permissions. This ensures that only authorized users can access the streams. Integration: - The primary platform that the SIP Trunk server will integrate with ...

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    I'm in need of a skilled professional to configure my Fusion PBX system to implement direct call routing. Key Requirements: - The system is currently cloud-hosted. Prior experience with cloud-hosted PBXs is a plus. - I have between 1-10 phone numbers that need to be set up for direct routing. So the Requirement is : You have to configure Inbound Calls using a Soft Switch and Route them to Outbound to an External Location. I am not familar with Fusion PBX UI, which is causing the Problem only. The ideal candidate for this project will have: - Relevant experience in configuring Fusion PBX systems. - Strong understanding of direct routing in PBX systems. - Prior experience with cloud-hosted PBX systems.

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    I'm in need of a skilled professional to configure my Fusion PBX system to implement direct call routing. Key Requirements: - The system is currently cloud-hosted. Prior experience with cloud-hosted PBXs is a plus. - I have between 1-10 phone numbers that need to be set up for direct routing. The ideal candidate for this project will have: - Relevant experience in configuring Fusion PBX systems. - Strong understanding of direct routing in PBX systems. - Prior experience with cloud-hosted PBX systems.

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    I am looking for an Asterisk/SIP expert to help me configure a SIP trunk. Specific tasks include: - Configuring the SIP trunk on my Asterisk server - Assisting with troubleshooting any issues that arise during the setup process Requirements: - Expertise in Asterisk and SIP configuration - Experience with setting up SIP trunks - Familiarity with troubleshooting Asterisk setups Additional information: - I already have a SIP provider - Ongoing maintenance assistance will be required after the SIP trunk has been configured.

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    I am looking for an English-speaking freelancer who can help us with rescheduling appointments for our medical spa. Your primary role will be to contact clients who have previously scheduled an appointment but didn't show up. Key Responsibilities: - Make outbound calls to clients to reschedule their missed appointments. - Provide excellent customer service and handle customer complaints or issues effectively. - Maintain a high level of professionalism and integrity throughout the communications. Ideal Skills and Experience: - Proven experience in making sale calls or appointment setting. - Strong persuasive skills is a must - you should be able to convince clients to reschedule their appointments. - Excellent customer service skills and a positive attitude. - Familiarity with VoIP s...

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    I'm in need of a skilled professional to configure my Fusion PBX system to implement direct call routing. Key Requirements: - The system is currently cloud-hosted. Prior experience with cloud-hosted PBXs is a plus. - I have between 1-10 phone numbers that need to be set up for direct routing. The ideal candidate for this project will have: - Relevant experience in configuring Fusion PBX systems. - Strong understanding of direct routing in PBX systems. - Prior experience with cloud-hosted PBX systems.

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    I'm in need of a skilled professional who can set up a virtual audio mixing station for my radio. This will be specifically for Windows, so deep knowledge of this platform is essential. We use SoftPhone Xlite 3.0 to call clients We need someone to show us how can we play audio file and that playing will be set as Microphone on xlite but after i play voice, i will need to be able to speak from microphone without need to change settings how can we achievve that? Key Requirements: - **Experience**: I need someone with a good amount of experience in setting up virtual audio mixers for radio stations. - **Windows Proficiency**: As this setup will be on Windows, you should be well-versed with this operating system. - **Intermediate Level**: I need an intermediate level of complexity ...

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    Flutter VoIP App Development 2 Hari left
    TERVERIFIKASI

    We have a voip app, voice calling with sip and fcm setup for the push notifications, we like to have a call alert like whatsapp calling alert that can handle both foreground and background states in Android and iOS. Also mention if somebody already worked on this type of feature, bid and connect to show a demo. Feature Required: Call Notification Incoming Screen Alert on App background and foreground State both killed or behind other apps. When you accept the call redirect to the ongoing call screen and call get connected with sip.

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    I require a professional to install Vital PBX on my server and program it to cater to our customer support needs. Key Requirements: - Vital PBX Installation: I need the freelancer to set up Vital PBX from scratch on my server. - Customization for Customer Support: The PBX system should be configured to enhance our customer support services. This might include call routing, IVR customization, and integration with our existing communication channels. Ideal Skills and Experience: - Proficiency in Vital PBX Installation: The freelancer should have experience in installing and setting up Vital PBX on various server environments. - PBX Programming: Strong background in programming PBX systems to meet specific organizational needs is crucial. - Customer Support Focus: Understanding of custome...

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    OpenSIPS VOIP System Enhancement 2 Hari left
    TERVERIFIKASI

    I am in need of an expert OpenSIPS VOIP Developer who can help create a robust system with high quality call routing. The main feature's to be implemented are NAT Handling in the Cloud, Microsoft Direct Routing, and Mid Registrar. The system should be designed to interact efficiently with PBX systems (FreeSWITCH) and OpenSIPS. Required Skills: - Extensive experience with OpenSIPS VOIP system development - Strong understanding of direct call routing - Proficiency in integrating VOIP systems with PBX and OpenSIPS - Familiarity with general telecoms concepts and technologies. The ideal freelancer should have worked on similar projects and be ready to showcase relevant examples in their proposal. If this project goes well, there could be more ongoing work. I look forward to discussing ...

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    I'm in need of a knowledgeable and experienced Asterisk expert for the implementation in our company We need an Asterisk specialist to help us set up a carousel of different numbers and provider accounts. The essence of the task, when calling, automatically should be substituted random number from our list. Details and scheme will be discussed individually

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    Experienced PBX / VOIP / SBC engineer 1 hari left
    TERVERIFIKASI

    I'm in need of an experienced PBX / VOIP / SBC engineer who can address several issues with our customers phone systems system. The primary goal of this project is to troubleshoot and maintain current systems. Key Responsibilities: - Troubleshoot ongoing call quality issues - Investigate and resolve call drops - Address any connectivity problems Skills Required: - Extensive experience with Asterisk and other PBX systems - In-depth knowledge of VOIP network architecture - Proven track record in troubleshooting and maintenance Please only apply if you have a strong background in VOIP technologies and are confident in your ability to resolve issues.

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    I'm in need of a freelancer with expertise in setting up Virtual PBX systems and CRM integration, particularly with Vitiger CRM. The primary use of this system will be for sales and marketing purposes. Key responsibilities will include, but are not limited to: - Setting up a Virtual PBX system - Configuring Vitiger CRM - Integrating the Virtual PBX system with Vitiger CRM for seamless operation - Enabling predictive dialing for 4 separate campaigns - Ensuring a smooth and efficient workflow between the PBX and CRM for sales and marketing purposes. Ideal skills for this job include: - Proficiency in Virtual PBX systems - Extensive experience with Vitiger CRM - Previous work with predictive dialing configurations - Strong understanding of sales and marketing processes - Excellent pro...

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    Asterisk Dev for Custom PBX System 21 jam left
    TERVERIFIKASI

    I'm seeking a proficient Asterisk developer who can build a custom PBX system with Issabela or something comparable. The PBX system requirements are as follows: - Less than 10 extensions. - Features such as call recording, auto-attendant, and call routing. - Compatible with VoIP phone lines. Ideal candidate should possess a deep expertise in Asterisk and a good understanding of VoIP technology. Knowledge of Issabela or similar software is an added advantage. Let's connect if you can guarantee a seamless and efficient communication system. For more information, sent the requerimients - The calls received would be answered by several receptionists who would log in/unlog in with their landline to receive the call. If there are more calls than receptionists, a message will appear ind...

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    As a rapidly expanding company providing business VOIP services, I'm seeking a professional experienced in selling VOIP solutions to small businesses. I believe that your experience and skills will deliver the results we anticipate. Key requirements: - Deep understanding and experience with VOIP services, particularly with features such as auto attendant, call recording and conference calling. - Proven track record in successfully targeting and selling to small businesses. This project requires a focused and accountable professional who can think strategically about our service offerings and can execute a sales strategy effectively. Your work will play a crucial role in expanding our customer base. If your experience aligns with these requirements, I look forward to reading your ...

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    Custom PBX System for Company 3 jam left
    TERVERIFIKASI

    I need a PBX system tailored for a small company with one to five phone lines or extensions. I also need to customize the caller ID. Key requirements are: - Building a PBX system for 1-5 phone lines/extensions. - Customizing the caller ID. Though the specific customization features for the caller ID were not mentioned, I'm expecting the ability to at least change caller names, formats, and add additional information. The system should be easy to use, reliable, and have room for expansion as my business grows. Please only apply if you have prior experience in developing PBX systems.

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    As a sysadmin developer, I'm in need of an asterisk specialist to build a Docker Compose script or a bash script for an interactive vocal server. This project is multifaceted, carrying out outbound calls and saving responses in a database. Key responsibilities are: * Creation of an Interactive voice response (IVR) system. * Outbound calling function connected with my API for automated scheduling of phone calls. * MySQL database integration to securely store the recorded responses. For this assignment, it would be ideal if you have proficiency in using Asterisk, Docker Compose, API integration along with comprehensive database management skills It would be a cherry on top if you have prior experience constructing interactive vocal servers. Let's connect to discuss the next s...

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    Cisco Switches (VLAN Mgmt) Terakhir left
    TERVERIFIKASI

    Check existing config. Create VLANs, IDs and name tag based on the existing design. Configure and test Device. Then move onto the next VLAN and so on. Both Console and Web interface available. Trunk Ports required for new APs. Switches will include Stackable Sg350x. I also have a number of HP Procurves but not to worry if these are not possible.

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    Cisco Switch Tasks Terakhir left
    TERVERIFIKASI

    Cisco SG350x Health check. Pull out an audit. Currently unplugged. Needs approval before we put it back online. Copy same config as the others on the same VLANs are working.

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